All Questions
38
questions
26
votes
10
answers
13k
views
How do black holes move if they are just regions in spacetime?
If black holes are just regions of spacetime, how can black holes even move? When matter moves through spacetime, it bends the spacetime around it, but if black holes are just regions of spacetime, ...
- 403
1
vote
0
answers
67
views
Types of singularities
I am confused about the types of singularities. According to my limited knowledge there are two types of singularity. One is space like singularity ( a curvature singularity enclosed within a null ...
- 21
0
votes
2
answers
119
views
Why do we defer to GR when describing black holes rather than rely on QM?
This is a broad question but it's well documented that GR and QM are very well tested in their own domains but they conflict around black holes.
Picture a neutron star slowly accreting matter until it'...
-4
votes
1
answer
151
views
If it's a common myth that a black hole contains a singularity, what does a black hole actually (likely) contain?
It's a common myth (especially in popsci) that a black hole contains a singularity. However, I cannot find an explanation for what we think a black hole actually does contain. The best I've seen is &...
- 127
5
votes
1
answer
236
views
Where does the singularity go in an Einstein-Rosen Bridge?
I've been reading up on some material about black holes and Einstein-Rosen bridges. Generally it is said that a black hole is defined by the event horizon (boundary in space where the gravitational ...
- 53
1
vote
2
answers
204
views
Is singularity without black hole possible?
I read things related to the topic I am asking and I found the idea of a "Naked Singularity" but naked singularities can't be created without black hole.
I need to know whether it is ...
- 27
0
votes
0
answers
53
views
Do strings prevent a black hole singularity? [duplicate]
Spacetime singularities are problematic in quantum gravity. String theory offers a way to construct such a quantum gravity.
Do strings offer a solution to this problem in the sense that point-like ...
- 500
0
votes
1
answer
151
views
Why do black holes remain? [closed]
When we think about black holes as not containing matter but being regions of warped spacetime, I can't think why they don't revert to being Euclidian space more quickly. This is because I can see how ...
- 740
1
vote
2
answers
156
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Is it possible the Black Holes to be pure deformations in the fabric of spacetime and not an effect of super-dense matter?
Is there any theory in the literature that supports this hypothesis that BHs in their center do not have a super-dense matter singularity but are pure deformations in the fabric of spacetime itself or ...
- 4,170
2
votes
3
answers
603
views
Spacetime inside the horizon of a black hole
According to Susskind a bit of information crossing the event horizon of a black hole instantaneously encounters the singularity. Also, time appears to gradually slow down for an object approaching ...
- 51
1
vote
1
answer
137
views
A Question About the Surface of a Black Hole Singularity
In Kip Thorne's book, Black Holes and Time Warps, he states that the mass of the core of a star shrinks until quantum gravity takes over. And then discusses that at this distance, the singularity ...
- 2,706
8
votes
2
answers
619
views
A naïve question about spacetime singularities
Very little that I know about general relativity is that there are solutions of its equations with singularities, and these are interpreted as black holes.
Mathematically, the most widespread kind of ...
- 513
11
votes
1
answer
2k
views
Do black holes exist in 1+1 dimensional spacetime?
I'm currently working in 1+1 dimensional spacetime and would like to know if black holes can exist in such a manifold? I think they can because the Schwarzchild metric has the coordinate singularity, ...
- 477
1
vote
0
answers
126
views
Free falling into a black hole: time to the singularity doubt!
I have trying to get a more precise insight into the calculation of the time to the singularity of a test mass into a non-rotatic uncharged black hole.
Prelude: the lagrangian for a massive particle ...
- 6,611
0
votes
0
answers
22
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Particles falling towards a singularity [duplicate]
This is a revision of my earlier question. Sorry. I'm a beginner here and on a learning curve regarding format.
If the gravity well steepens to infinity at the point of a singularity, then so does ...
